2016-09-10 20:54:26 +08:00
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From 2026557f3f9df2d0563f71b4bd704956c4cfd4ab Mon Sep 17 00:00:00 2001
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2016-04-24 19:03:39 +08:00
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From: Dave Stevenson <6by9@users.noreply.github.com>
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Date: Fri, 1 Apr 2016 15:28:46 +0100
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2016-09-10 20:54:26 +08:00
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Subject: [PATCH] RPi config: Add CONFIG_PWM_PCA9685 for NXP PCA9685 driver
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over I2C
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2016-04-24 19:03:39 +08:00
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Includes DT overlay to configure it.
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Signed-off-by: Dave Stevenson <6by9@users.noreply.github.com>
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---
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arch/arm/boot/dts/overlays/Makefile | 1 +
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arch/arm/boot/dts/overlays/README | 6 +++++
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.../boot/dts/overlays/i2c-pwm-pca9685a-overlay.dts | 26 ++++++++++++++++++++++
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arch/arm/configs/bcm2709_defconfig | 1 +
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arch/arm/configs/bcmrpi_defconfig | 1 +
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5 files changed, 35 insertions(+)
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create mode 100644 arch/arm/boot/dts/overlays/i2c-pwm-pca9685a-overlay.dts
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--- a/arch/arm/boot/dts/overlays/Makefile
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+++ b/arch/arm/boot/dts/overlays/Makefile
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@@ -30,6 +30,7 @@ dtbo-$(RPI_DT_OVERLAYS) += hy28b.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += i2c-rtc.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += i2c-gpio.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += i2c-mux-pca9548a.dtbo
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+dtbo-$(RPI_DT_OVERLAYS) += i2c-pwm-pca9685a.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += i2c0-bcm2708.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += i2c1-bcm2708.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += i2s-mmap.dtbo
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -366,6 +366,12 @@ Load: dtoverlay=i2c-mux-pca9548a,<para
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Params: addr I2C address of PCA9548A (default 0x70)
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+Name: i2c-pwm-pca9685a
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+Info: Adds support for an NXP PCA9685A I2C PWM controller on i2c_arm
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+Load: dtoverlay=i2c-pwm-pca9685a,<param>=<val>
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+Params: addr I2C address of PCA9685A (default 0x40)
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+
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+
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Name: i2c-rtc
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Info: Adds support for a number of I2C Real Time Clock devices
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Load: dtoverlay=i2c-rtc,<param>=<val>
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/i2c-pwm-pca9685a-overlay.dts
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@@ -0,0 +1,26 @@
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+// Definitions for NXP PCA9685A I2C PWM controller on ARM I2C bus.
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+/dts-v1/;
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+/plugin/;
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+
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+/{
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+ compatible = "brcm,bcm2708";
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+
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+ fragment@0 {
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+ target = <&i2c_arm>;
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+ __overlay__ {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ status = "okay";
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+
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+ pca: pca@40 {
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+ compatible = "nxp,pca9685";
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+ #pwm-cells = <2>;
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+ reg = <0x40>;
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+ status = "okay";
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+ };
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+ };
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+ };
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+ __overrides__ {
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+ addr = <&pca>,"reg:0";
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+ };
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+};
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--- a/arch/arm/configs/bcm2709_defconfig
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+++ b/arch/arm/configs/bcm2709_defconfig
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@@ -1122,6 +1122,7 @@ CONFIG_MCP320X=m
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CONFIG_MCP3422=m
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CONFIG_DHT11=m
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CONFIG_PWM_BCM2835=m
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+CONFIG_PWM_PCA9685=m
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CONFIG_RASPBERRYPI_FIRMWARE=y
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CONFIG_EXT4_FS=y
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CONFIG_EXT4_FS_POSIX_ACL=y
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--- a/arch/arm/configs/bcmrpi_defconfig
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+++ b/arch/arm/configs/bcmrpi_defconfig
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@@ -1129,6 +1129,7 @@ CONFIG_MCP320X=m
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CONFIG_MCP3422=m
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CONFIG_DHT11=m
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CONFIG_PWM_BCM2835=m
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+CONFIG_PWM_PCA9685=m
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CONFIG_RASPBERRYPI_FIRMWARE=y
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CONFIG_EXT4_FS=y
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CONFIG_EXT4_FS_POSIX_ACL=y
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